Hello, Nlanderos261. Welcome to the QuickBooks Community.
Yes, those are generated by QuickBooks or internal system users that the program automatically creates to handle some tasks. You might see a couple of different Administration users in QuickBooks Online. They're not a security risk and are necessary for the software to function correctly. I'll explain what each one does below.
If you see Online Banking Administration, it means QuickBooks automatically made a change related to your connected bank accounts.
If you see System Administration, that's QuickBooks making an automatic change. It happens when you connect an app, when a change made affects other records, or when you have recurring transactions set up.